EGR cooler suitable for engine

Abstract

The EGR cooler suitable for the engine particularly relates to the technical field of EGR coolers and comprises a box body, first supporting plates are connected to the two sides of the box body in an inserted mode, a plurality of heat dissipation pipes used for allowing waste gas to pass through are connected between the two first supporting plates in an inserted mode, and connecting grooves are formed in the two sides of the box body. The top of the box body is fixedly communicated with two connecting pipes for cooling liquid to pass through, the two sides of the box body are provided with dismounting mechanisms for conveniently taking out the radiating pipes from the interior of the box body, and each connecting pipe is communicated with an external pipeline. The heat dissipation pipe can be pulled out from the interior of the box body through the dismounting mechanism, a worker can conveniently clean impurities outside the heat dissipation pipe, the cooling effect of waste gas is prevented from being affected, the connecting pipe and an external pipeline can be fixed together through the fixing mechanism, and leakage of cooling liquid is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to EGR cooler technical field, concretely relates to a kind of EGR coolers suitable for engine. BACKGROUND

[0002] EGR cooler is the key component for reducing nitrogen oxides (NOx) emissions in modern engine. Its main function is to cool a part of exhaust gas through turbocharger, and then introduce the cooled exhaust gas into the combustion chamber of the engine, by reducing the temperature of exhaust gas into the combustion chamber, EGR cooler helps to reduce the formation of NOx, because these nitrogen oxides are mainly formed at high temperature, in addition, EGR cooler can also help to improve the thermal management of engine, improve combustion efficiency.

[0003] For example, a kind of EGR cooler provided in Chinese patent application No.202321537276.4, including the shell with both ends being open, the shell one end is air inlet end, the other end is air outlet end, the air outlet end of shell is sealingly connected with air outlet chamber, the end of shell close to air outlet chamber is connected with water outlet elbow, the outer end of air outlet chamber is provided with air outlet, the end port of air outlet chamber and shell connection is sealingly connected with second baffle;The air inlet end of shell is connected with flange edge, the end of shell setting flange edge and shell is connected with arc-shaped water inlet pipe, water inlet pipe and shell inner cavity are connected, the flange edge is provided with water inlet communicated with water inlet pipe;This technical scheme omits air inlet chamber, the exhaust gas input from air inlet end directly exchanges heat with cooling water, thereby effectively improving heat exchange efficiency.

[0004] However, the following problems still exist in this technical scheme: during the cooling of exhaust gas, cooling liquid needs to be continuously put into EGR cooler for cooling effect, which will produce impurities on the outside of EGR radiator pipe, reducing the cooling contact area, thereby greatly weakening the cooling effect on exhaust gas. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of EGR coolers suitable for engine, can pull out the radiator pipe from the inside of box by dismounting mechanism, it is convenient for staff to clean the impurities outside radiator pipe, avoid affecting the cooling effect of exhaust gas, also by fixed mechanism, connecting pipe and external pipeline can be fixed together, avoid the leakage of cooling liquid, to solve the above insufficient place in technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an EGR cooler suitable for an engine, comprising a housing, wherein first support plates are inserted into both sides of the housing, and multiple heat dissipation pipes for passing exhaust gas are inserted between the two first support plates. Connecting grooves are provided on both sides of the housing, and two connecting pipes for passing coolant are fixedly connected to the top of the housing. Disassembly mechanisms for easily removing the heat dissipation pipes from the inside of the housing are provided on both sides of the housing, and each connecting pipe is connected to an external pipe.

[0007] Preferably, the disassembly mechanism includes two first connecting plates on both sides of the connecting groove, each first connecting plate having a first threaded hole, and two second threaded holes on both sides of the housing. The first and second threaded holes are connected internally by the same first bolt. A second support plate is provided on the side of the two first support plates that are far apart from each other. Two insertion slots are provided on both sides of the housing, and a second connecting plate is fixedly provided on both sides of the second support plate. The second connecting plate is adapted to the insertion slot to facilitate the removal of the heat dissipation pipe from inside the housing.

[0008] Preferably, each of the insertion slots has a third threaded hole inside, and the second connecting plate has a fourth threaded hole. The third threaded hole and the fourth threaded hole are connected by the same second bolt for fixing the second support plate.

[0009] Preferably, the first support plate has two fifth threaded holes and the second support plate has two sixth threaded holes. The connected fifth and sixth threaded holes are internally threaded with the same third bolt for fixing the first and second support plates together.

[0010] Preferably, the connecting pipe is provided with a fixing mechanism for fixing the external pipe and the connecting pipe. The fixing mechanism includes a fixing plate provided on the outside of the connecting pipe. The fixing plate has multiple placement slots. A rotating shaft is provided inside the placement slot. A limiting plate is provided through the outside of the rotating shaft. Coil springs are fixed on both sides of the limiting plate. The ends of the two coil springs that are far apart are fixedly connected to the inner wall of the fixing plate for fixing the external pipe and the connecting pipe.

[0011] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0012] 1. Coolant enters the connecting pipe through the external pipe on the left, and then enters the housing through the connecting pipe. Exhaust gas enters the radiator pipe through the connecting slot on the left. The coolant inside the housing absorbs heat from the exhaust gas, thus lowering its temperature. The cooled exhaust gas then exits through the connecting slot on the right, re-enters the cooling air pipe, and is reinjected into the engine. The heated coolant then exits through the connecting pipe on the right.

[0013] 2. When it is necessary to remove the heat pipe from the inside of the box, first turn the first bolt to turn it out from the first and second threaded holes, remove the connecting groove from one side of the box, then turn the second bolt to turn it out from the fourth and third threaded holes, and then turn the third bolt to turn it out from the fifth and sixth threaded holes. This will allow the second support plate to be removed from the first support plate. Then pull the first support plate to pull the heat pipe out from the inside of the box, making it easier for staff to clean the impurities on the outside of the heat pipe and avoid affecting the cooling effect of the exhaust gas.

[0014] 3. Place the external pipe on top of the connecting pipe, and then rotate the limiting plate. The rotating shaft on one side of the limiting plate can use its own elasticity to fix the limiting plate to the bottom of the external pipe. The limiting plate can fix the connecting pipe and the external pipe together to prevent coolant leakage. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a sectional view of the box body of this utility model;

[0018] Figure 3 This is a schematic diagram of the disassembly mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the second support plate of this utility model, which is located away from the first support plate;

[0020] Figure 5 This is a schematic diagram of the heat dissipation pipe of this utility model;

[0021] Figure 6 This is a schematic diagram of the fixing mechanism of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing, 2. First support plate, 3. Heat dissipation pipe, 4. Connecting slot, 5. Connecting pipe;

[0024] 6 Disassembly mechanism, 601 First connecting plate, 602 First threaded hole, 603 Second threaded hole, 604 First bolt, 605 Second support plate, 606 Insertion groove, 607 Second connecting plate, 608 Third threaded hole, 609 Fourth threaded hole, 610 Second bolt, 611 Fifth threaded hole, 612 Sixth threaded hole, 613 Third bolt;

[0025] 7. External pipes;

[0026] 8. Fixing mechanism, 801. Fixing plate, 802. Placement slot, 803. Rotating shaft, 804. Limiting plate, 805. Coil spring. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figures 1-6 The EGR cooler for an engine shown includes a housing 1, with first support plates 2 inserted into both sides of the housing 1. Multiple heat dissipation pipes 3 for passing exhaust gas are inserted between the two first support plates 2. Connecting grooves 4 are provided on both sides of the housing 1. Two connecting pipes 5 for passing coolant are fixedly connected to the top of the housing 1. Disassembly mechanisms 6 are provided on both sides of the housing 1 to facilitate the removal of the heat dissipation pipes 3 from the inside of the housing 1. Each connecting pipe 5 is connected to an external pipe 7.

[0029] The coolant enters the connecting pipe 5 through the external pipe 7 on the left, and then enters the housing 1 through the connecting pipe 5. The exhaust gas enters the cooling pipe 3 through the connecting groove 4 on the left. The coolant inside the housing 1 can absorb the heat in the exhaust gas to reduce the exhaust gas temperature. The cooled exhaust gas is then discharged through the connecting groove 4 on the right and re-enters the cooling pipe, from where it is injected back into the engine. The cooled coolant, which has increased in temperature, is then discharged through the connecting pipe 5 on the right.

[0030] like Figures 3-5As shown, the disassembly mechanism 6 includes two first connecting plates 601 on both sides of the connecting groove 4. Each first connecting plate 601 has a first threaded hole 602. The box body 1 has two second threaded holes 603 on both sides. The first threaded holes 602 and the second threaded holes 603 are connected by the same first bolt 604. The two first support plates 2 are provided with a second support plate 605 on the side that is far apart from each other. The box body 1 has two insertion grooves 606 on both sides. The second support plate 605 is fixedly provided with a second connecting plate 607 on both sides. The second connecting plate 607 is adapted to the insertion groove 606.

[0031] like Figures 3-5 As shown, each of the insertion slots 606 has a third threaded hole 608 inside, and the second connecting plate 607 has a fourth threaded hole 609. The third threaded hole 608 and the fourth threaded hole 609 are connected by the same second bolt 610. The first support plate 2 has two fifth threaded holes 611, and the second support plate 605 has two sixth threaded holes 612. The fifth threaded hole 611 and the sixth threaded hole 612 are connected by the same third bolt 613.

[0032] To clean the impurities on the outside of the heat sink 3, it is necessary to remove the heat sink 3 from the inside of the housing 1. First, rotate the first bolt 604 to turn it out from the first threaded hole 602 and the second threaded hole 603, and remove the connecting groove 4 from one side of the housing 1. Then, rotate the second bolt 610 to turn it out from the fourth threaded hole 609 and the third threaded hole 608. Continue to rotate the third bolt 613 to turn it out from the fifth threaded hole 611 and the sixth threaded hole 612, so that the second support plate 605 can be removed from the first support plate 2. Then, pull the first support plate 2 to pull the heat sink 3 out from the inside of the housing 1, which makes it convenient for the staff to clean the impurities on the outside of the heat sink 3 and avoid affecting the cooling effect of the exhaust gas.

[0033] like Figure 6 As shown, the connecting pipe 5 is provided with a fixing mechanism 8 for fixing the external pipe 7 and the connecting pipe 5. The fixing mechanism 8 includes a fixing plate 801 provided on the outside of the connecting pipe 5. The fixing plate 801 has multiple placement slots 802. The placement slots 802 are provided with a rotating shaft 803 inside. The rotating shaft 803 is provided with a limiting plate 804 through it. Both sides of the limiting plate 804 are fixedly provided with coil springs 805. The ends of the two coil springs 805 that are far apart are fixedly connected to the inner wall of the fixing plate 801.

[0034] Place the external pipe 7 on top of the connecting pipe 5, and then rotate the limiting plate 804. The rotating shaft 803 on one side of the limiting plate 804 can use its own elasticity to fix the limiting plate 804 to the bottom of the external pipe 7. The limiting plate 804 can fix the connecting pipe 5 and the external pipe 7 together to prevent coolant leakage.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An EGR cooler for an engine, comprising a housing (1), characterized in that: The box (1) has first support plates (2) inserted on both sides, and multiple heat dissipation pipes (3) for passing exhaust gas are inserted between the two first support plates (2). The box (1) has connecting grooves (4) on both sides. The top of the box (1) is fixedly connected to two connecting pipes (5) for passing coolant. The box (1) has disassembly mechanisms (6) on both sides for convenient removal of heat dissipation pipes (3) from the inside of the box (1). The disassembly mechanism (6) includes two first connecting plates (601) on both sides of the connecting groove (4). Each first connecting plate (601) has a first threaded hole (602). The box body (1) has two second threaded holes (603) on both sides. The first threaded hole (602) and the second threaded hole (603) are connected by the same first bolt (604). The two first support plates (2) are provided with a second support plate (605) on the side away from each other. The box body (1) has two insertion slots (606) on both sides. The second support plate (605) is fixedly provided with a second connecting plate (607) on both sides.

2. The EGR cooler for an engine according to claim 1, characterized in that: The second connecting plate (607) is adapted to the insertion slot (606).

3. An EGR cooler suitable for an engine according to claim 1, characterized in that: Each of the insertion slots (606) has a third threaded hole (608) inside, and the second connecting plate (607) has a fourth threaded hole (609). The third threaded hole (608) and the fourth threaded hole (609) are connected by the same second bolt (610).

4. An EGR cooler suitable for an engine according to claim 1, characterized in that: The first support plate (2) has two fifth threaded holes (611), and the second support plate (605) has two sixth threaded holes (612). The fifth threaded holes (611) and the sixth threaded holes (612) are connected by the same third bolt (613).

5. An EGR cooler for an engine according to claim 1, characterized in that: Each of the connecting pipes (5) is connected to an external pipe (7).

6. An EGR cooler suitable for an engine according to claim 5, characterized in that: The connecting pipe (5) is provided with a fixing mechanism (8) for fixing the external pipe (7) and the connecting pipe (5) on the outside; The fixing mechanism (8) includes a fixing plate (801) disposed outside the connecting pipe (5). The fixing plate (801) has multiple placement slots (802). A rotating shaft (803) is disposed inside the placement slot (802). A limiting plate (804) is disposed through the outside of the rotating shaft (803). Coil springs (805) are fixedly disposed on both sides of the limiting plate (804). The ends of the two coil springs (805) that are far apart are fixedly connected to the inner wall of the fixing plate (801).

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